Ideas & Opportunity

How do I know when I've validated enough to actually start building?

A starting point

Validation is never fully 'done,' but it's enough when you can name a specific person, describe the exact painful moment, and point to evidence they'll pay, ideally money already changed hands. Endless research becomes a way to avoid the risk of building, so once a few real buyers are pulling the product out of your hands, stop interviewing and ship the smallest thing that delivers the outcome. The signal you're ready is impatient customers, not a perfect spreadsheet.

Go deeper

Hand-picked from around the web, each with a note on why it earns your time.

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▶️ Video

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Why we picked it Founders often keep validating because they secretly doubt the idea itself, so a structured way to judge the idea is half the readiness question. YC partner Jared Friedman gives an idea quality score across four criteria (how big, founder/market fit, how sure you are the problem is real, and whether you have a genuine insight) plus the bad filters that make founders quietly reject their best ideas. It is the honest bar to check your idea against before you commit to building. A starting framework, not a scorecard to obsess over.

How to Get and Evaluate Startup Ideas

On Y Combinator Startup School by Jared Friedman ~25 min

Rate an idea on four criteria and average them, rather than trusting a gut yes or no.
Great companies usually started from a good enough idea plus strong execution, not a brilliant one, so waiting for the perfect idea is itself a mistake.
Watch for filters (seems hard, boring space, too ambitious, competitors exist) that make you reject strong ideas without realising it.

Watch on YouTube youtube.com →

Read

✍️ Essay

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Why we picked it Most validation advice tells you to keep talking to users but never tells you when you are done. This piece gives you five concrete readiness checks (direct payment evidence, a one-sentence customer definition, 10 or more real pain-confirming conversations, a real edge, and the financial capacity to be wrong) and a plain rule: score four or five yeses and you build. It also names the trap directly, that validation past four weeks is just burning the runway you were trying to protect. Treat it as a starting checklist, not a verdict.

Build an MVP or Validate First? How to Decide

From Proof Engine ~10 min read

Validation should take two to four weeks; beyond that you are procrastinating, not de-risking.
The clearest signal is direct payment evidence (pre-orders, letters of intent, card signups), not enthusiastic conversations.
Score your readiness across five questions: four or five yeses means build, zero or one means keep validating.

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People also ask

What does 'validating an idea' actually mean? Validation is gathering real-world evidence that a specific group of people has a painful problem AND will change their behaviour (pay, sign up, sw... Beginner 3 resources → How do I know if my idea is any good? Judge it on the problem, not the solution: is it a real, frequent, painful problem for a reachable group of people, and are you unusually well-plac... Beginner 4 resources → How do I validate an idea without building anything? Replace the product with a conversation, a manual service, or a landing page. Interview people about the problem, hand-deliver the outcome yourself... Beginner 3 resources → How do I talk to customers without getting false positives? Never pitch your idea in the interview, it invites polite lies. Ask about their real life and past behaviour: the last time they hit the problem, w... Beginner 3 resources → How many people should I talk to, and how do I find them? Aim for enough that patterns repeat, often 15-30 focused conversations before signal stabilises. Find them by going where the problem lives: your o... Beginner 3 resources → What is an MVP and what's the smallest one I can build? An MVP is the least you can build (or fake) to learn whether your riskiest assumption is true. Often it isn't software at all: a manual service, a ... Beginner 3 resources →